sleep in: to sleep until after the time you usually get up in the morning 迟起；睡过头；睡懒觉
shuteye: informal term for sleep 睡眠
tease apart: to pull something gently apart into separate pieces 梳理
shift-worker
all-nighter: a time when you stay awake all night studying 通宵学习；开通宵夜车[@more@]ramification: one of the large number of complicated and unexpected results that follow an action or a decision （众多复杂而又难以预料的）结果，后果
weeknight: any night except those on Saturday and Sunday
bank up: to heap or mound up something to guard against something